Remote control for air-conditioning apparatus

ABSTRACT

A remote control for an air-conditioning apparatus that includes an outdoor unit and an indoor unit connected to the outdoor unit by a pipe to condition air in an indoor room, the remote control being configured to bi-directionally communicate with the indoor unit, the remote control comprising: a first segment display part in which two or more seven-segments are arranged; a second segment display part in which two or more seven-segments are arranged; and a controller, wherein, in a failure mode in which a failure in either the outdoor unit or the indoor unit is diagnosed, the controller makes the first segment display part display a transmission code indicating which of the outdoor unit and the indoor unit is diagnosed to thereby identify a failure, and makes the second segment display part display an error code representing diagnosis content for the outdoor unit or the indoor unit.

TECHNICAL FIELD

The present disclosure relates to a remote control for anair-conditioning apparatus that communicates bi-directionally with anindoor unit.

BACKGROUND ART

Hitherto, for the purpose of controlling the operation of anair-conditioning apparatus, indoor units and remote controls inrelated-art air-conditioning apparatuses bi-directionally communicatewith each other to transmit and receive information about roomtemperature and other operating status. If the user suspects that anoutdoor unit or an indoor unit may have failed, the user sends a commandto an indoor unit from a remote control to diagnose the failure of anoutdoor unit or an indoor unit. Then, the indoor unit sends an errorcode indicating the content of the failure and the remote controldisplays the received error code. At this time, the remote control alsodisplays a transmission code indicating which of an outdoor unit and anindoor unit is to be diagnosed. That is, the remote control is requiredto display a transmission code and an error code. Patent Literature 1discloses a remote control for an air-conditioning apparatus in which adot matrix display part is provided in a part of a liquid crystaldisplay screen.

CITATION LIST Patent Literature

Patent Literature 1: Japanese Unexamined Patent Application PublicationNo. 2007-101174

SUMMARY OF INVENTION Technical Problem

Since the remote control for an air-conditioning apparatus disclosed inPatent Literature 1 has a dot matrix display part, the remote controlcan display a transmission code and an error code. However, in the dotmatrix display part, the wiring of the substrate is complicated, andhence an arithmetic element is increased in size, resulting in anincrease in size of the remote control. In addition, the dot matrixdisplay part is more expensive than the segment display part in whichprinting is performed in advance on a part to be displayed.

The present disclosure has been made to solve the problems mentionedabove, and an object thereof is to provide a remote control for anair-conditioning apparatus that can display a transmission code and anerror code even if an increase in size is suppressed by using a segmentdisplay part that is less expensive than the dot matrix display part.

Solution to Problem

The remote control for an air-conditioning apparatus according to anembodiment of the present disclosure is the remote control used for theair-conditioning apparatus that includes an outdoor unit and an indoorunit connected to the outdoor unit by a pipe to condition air in anindoor room, the remote control being configured to bi-directionallycommunicate with the indoor unit, the remote control comprising: a firstsegment display part in which two or more seven-segments are arranged; asecond segment display part in which two or more seven-segments arearranged; and a controller, wherein, in a failure mode in which afailure in either the outdoor unit or the indoor unit is diagnosed, thecontroller makes the first segment display part display a transmissioncode indicating which of the outdoor unit and the indoor unit isdiagnosed to thereby identify a failure, and makes the second segmentdisplay part display an error code being sent from the indoor unit andrepresenting diagnosis content for the outdoor unit or the indoor unit.

Advantageous Effects of Invention

According to the present disclosure, the controller makes the firstsegment display part display the transmission code and makes the secondsegment display part display the error code in the failure mode. Asdescribed above, the remote control for an air-conditioning apparatuscan display the transmission code and the error code even if the segmentdisplay part, which is less expensive than the dot matrix display part,is used to prevent the segment display part from increasing in size.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a circuit diagram illustrating an air-conditioning apparatus100 according to Embodiment 1 of the present disclosure.

FIG. 2 is a perspective view illustrating an indoor unit 2 and a remotecontrol 1 according to Embodiment 1 of the present disclosure.

FIG. 3 is a hardware configuration of the air-conditioning apparatus 100according to Embodiment 1 of the present disclosure.

FIG. 4 is a schematic view illustrating an operating part 5 of theair-conditioning apparatus 100 according to Embodiment 1 of the presentdisclosure.

FIG. 5 is a schematic view illustrating a display 4 in the normal modeof the air-conditioning apparatus 100 according to Embodiment 1 of thepresent disclosure.

FIG. 6 is a schematic view illustrating the display 4 in the failuremode of the air-conditioning apparatus 100 according to Embodiment 1 ofthe present disclosure.

FIG. 7 is a schematic view illustrating the display 4 in the failuremode of the air-conditioning apparatus 100 according to Embodiment 1 ofthe present disclosure.

FIG. 8 is a flowchart illustrating the operation in the failure mode ofthe remote control 1 according to Embodiment 1 of the presentdisclosure.

DESCRIPTION OF EMBODIMENTS Embodiment 1

Hereinafter, an embodiment of the remote control for theair-conditioning apparatus according to the present disclosure will bedescribed referring to the drawings. FIG. 1 is a circuit diagramillustrating the air-conditioning apparatus 100 according to Embodiment1 of the present disclosure. As shown in FIG. 1, the air-conditioningapparatus 100 is a device that conditions air in an indoor space, andincludes an outdoor unit 6, an indoor unit 2 capable of communicatingwith the outdoor unit 6, and a remote control 1. The outdoor unit 6 isprovided with a compressor 71, a flow passage switching device 72, anoutdoor heat exchanger 73, an outdoor fan 74 and an expansion device 75.The indoor unit 2 is provided with an indoor heat exchanger 76 and anindoor fan 77.

The compressor 71, the flow passage switching device 72, the outdoorheat exchanger 73, the expansion device 75 and the indoor heat exchanger76 are connected by pipes to form a refrigerant circuit 70. Thecompressor 71 is configured to suction a refrigerant in alow-temperature and low-pressure state, and decompress the suctionedrefrigerant to turn it to be a high-temperature and high-pressurerefrigerant and discharge. The flow passage switching device 72 isconfigured to switch the direction in which refrigerant flows in therefrigerant circuit 70, and is a four-way valve, for example. Theoutdoor heat exchanger 73 causes, for example, heat exchange to beperformed between the outdoor air and the refrigerant. The outdoor heatexchanger 73 serves as a condenser during the cooling operation, andserves as an evaporator during the heating operation.

The outdoor fan 74 is a device configured to send outdoor air to theoutdoor heat exchanger 73. The expansion device 75 is a pressurereducing valve or an expansion valve configured to decompress and expandrefrigerant. The expansion device 75 is, for example, an electronicexpansion valve of which the opening degree is adjusted. The indoor heatexchanger 76 is, for example, one that causes heat exchange to beperformed between the indoor air and the refrigerant. The indoor heatexchanger 76 serves as an evaporator during the cooling operation andserves as a condenser during the heating operation. The indoor fan 77 isa device configured to send the indoor air to the indoor heat exchanger76.

(Operation Mode, Cooling Operation)

Next, the operation modes of the air-conditioning apparatus 100 will bedescribed. First, the cooling operation will be explained. In thecooling operation, refrigerant which is suctioned into the compressor 71is compressed by the compressor 71 and is discharged in a high-pressureand high-temperature gaseous state. The high-temperature andhigh-pressure gaseous refrigerant discharged from the compressor 71passes through the flow passage switching device 72, and flows into theoutdoor heat exchanger 73 serving as a condenser. The refrigerantcondenses and liquefies in the outdoor heat exchanger 73 through heatexchange with the outdoor air sent by the outdoor fan 74. The condensedliquid state refrigerant flows into the expansion device 75, and isexpanded and decompressed to be two-phase, low-temperature andlow-pressure gas-liquid refrigerant. Then, the two-phase gas-liquidrefrigerant flows into the indoor heat exchanger 76 serving as anevaporator. In the indoor heat exchanger 76, the refrigerant evaporatesand gasifies through heat exchange with the indoor air sent by theindoor fan 77. At this time, the indoor air is cooled, whereby coolingis performed in the room. The evaporated low-temperature, low-pressuregaseous refrigerant passes through the flow passage switching device 72and is suctioned into the compressor 71.

(Operation Mode, Heating Operation)

Next, the heating operation will be described. In the heating operation,the refrigerant suctioned into the compressor 71 is compressed by thecompressor 71 and is discharged in a high-temperature and high-pressuregaseous state. The high-temperature and high-pressure gaseousrefrigerant discharged from the compressor 71 passes through the flowpassage switching device 72 and flows into the indoor heat exchanger 76serving as a condenser. In the indoor heat exchanger 76, the refrigerantcondenses and liquefies through heat exchange with the indoor air sentby the indoor fan 77. At this time, the indoor air is heated, wherebyheating is performed in the room. The condensed liquid state refrigerantflows into the expansion device 75, and is expanded and depressurized tobe the low-temperature and low-pressure two-phase refrigerant. Then, thetwo-phase gas-liquid refrigerant flows into the outdoor heat exchanger73 serving as an evaporator, and in the outdoor heat exchanger 73, therefrigerant evaporates and gasifies through heat exchanged with theoutdoor air sent by the outdoor fan 74. The evaporated low-temperature,low-pressure gaseous refrigerant passes through the flow passageswitching device 72 and is suctioned into the compressor 71.

FIG. 2 is a perspective view illustrating the indoor unit 2 and theremote control 1 according to Embodiment 1 of the present disclosure.The remote control 1 performs bi-directional communication with theindoor unit 2. As shown in FIG. 2, the remote control 1 transmits andreceives data to and from the indoor unit 2 via the filters 3 providedin the remote control 1. In Embodiment 1, the remote control 1 has anormal mode and a failure mode as built-in modes. The normal mode is amode used when the air-conditioning apparatus 100 performs the coolingoperation or the heating operation. The failure mode is a mode used whendiagnosing the failure of the outdoor unit 6 or the indoor unit 2. Ifthere is a possibility that the outdoor unit 6 or the indoor unit 2 hasfailed, when the user sends a command from the remote control 1 to theindoor unit 2 to diagnose the failure of the outdoor unit 6 or theindoor unit 2, the remote control 1 switches from the normal mode to thefailure mode.

The remote control 1 and the indoor unit 2 communicate using signalsrelating to air conditioning. By the air-conditioning-related signals,for example, an operation switching command for switching between thecooling operation and the heating operation, air conditioning-relatedinformation such as information of the set temperature and thetemperature of the room measured by the air-conditioning apparatus 100are transmitted. For example, if the heating operation is performed,when the user presses the operation switching button of the remotecontrol 1, the remote control 1 transmits the indoor unit 2 theoperation switching command for switching from the heating operation tothe cooling operation as an air conditioning-related signal. The indoorunit 2 receives the air conditioning-related signal of the operationswitching command, the air-conditioning apparatus 100 switches from theheating operation to the cooling operation.

FIG. 3 is the hardware configuration of the air-conditioning apparatus100 according to Embodiment 1 of the present disclosure. As shown inFIG. 3, the indoor unit 2 has an indoor side transmitting and receivingunit 20 and an indoor side control device 23. The indoor sidetransmitting and receiving unit 20 is configured to transmit and receiveinformation to and from the remote control 1, and includes an indoorside transmitting unit 21, and an indoor side receiving unit 22. Theindoor side transmitting unit 21 includes a light emitting diode, whichis a transmitting module. The light emitting diode transmits airconditioning-related signals by combining emission and non-emission ofinfrared rays. The indoor side receiving unit 22 has a photodiode, whichis a receiving module. The photodiode receives infrared rays emitted bythe light emitting diode, to thereby generate an electric signalcorresponding to emission ad non-emission of infrared rays. The indoorside control device 23 transmits an electric signal that makes the lightemitting diodes of the indoor side transmitting unit 21 emit and notemit infrared rays. Further, the indoor side control device 23 receivesan electric signal from the indoor side receiving unit 22.

The remote control 1 includes a remote control-side transmitting andreceiving unit 10, an operation unit 5, a display 4, and a controller13. The remote control side transmitting and receiving unit 10 isconfigured to transmit and receive information to and from the indoorunit 2, and includes a remote control side transmitting part 11 and aremote control side receiving part 12. The remote control sidetransmitting part 11 has a light emitting diode, which is a transmissionmodule. The light emitting diode transmits the air conditioning-relatedsignal by combining the emission and non-emission of infrared rays. Theremote control side receiving part 12 has a photodiode, which is areceiving module. The photodiode receives the infrared light emitted bythe light emitting diode, to thereby generate an electrical signalcorresponding to emission and non-emission of infrared rays.

FIG. 4 is a schematic view illustrating the operating part 5 of theair-conditioning apparatus 100 according to Embodiment 1 of the presentdisclosure. As shown in FIG. 4, the operating part 5 includes anoperation stop button 44, a temperature setting button 40, a wind speedsetting button 41, a wind direction setting button 42, a timer-on button45, a timer-off button 46, a time setting button 43, and a failure modebutton 47. The operation stop button 44 is a button configured tocommand the air-conditioning apparatus 100 to run or stop running. Thetemperature setting button 40 is a button configured to set thetemperature of the indoor unit 2.

The wind speed setting button 41 is a button configured to set the speedof the air sent to the room by the indoor unit 2. The wind directionsetting button 42 is a button configured to set the direction of the airsent by the indoor unit 2 to the room. The timer-on button 45 is abutton configured to set a turn-on timer that enables theair-conditioning apparatus 100 to automatically start the operation at aset time. The timer-off button 46 is a button configured to set aturn-off timer that enables the air-conditioning apparatus 100 toautomatically stop the operation at a set time. The time setting button43 is a button configured to set a time for either of the turn-on timerand the turn-off timer.

The failure mode button 47 is a button that can be pressed by only athing with a narrow tip, and when pressed, the remote control 1 entersthe failure mode. Incidentally, in Embodiment 1, a case of using thefailure mode button 47 is exemplified. However, as long as it has afunction of preventing an erroneous operation, the failure mode buttonmay have other configurations. For example, the remote control 1 may beswitched to the failure mode by multiple pressing by the user, i.e.pressing a plurality of buttons simultaneously. Further, the remotecontrol 1 may be switched to the failure mode by pressing plurality ofbuttons in a predetermined order by the user.

FIG. 5 is a schematic view illustrating the display 4 in the normal modeof the air-conditioning apparatus 100 according to Embodiment 1 of thepresent disclosure. As shown in FIG. 5, the display 4 is, for example, asegmented liquid crystal display in which image pixels and a transparentelectrode identical with the image pixels are printed. The display 4includes a first segment display part 54, a second segment display part50, a wind speed display part 51, and a wind direction display part 55.The first segment display part 54 has two or more seven-segments beingarranged, and displays the current time or the timer time. In FIG. 5,the time “12:24” is displayed as an example of the first segment displaypart 54.

The second segment display part 50 has two seven-segments beingarranged, and displays the set temperatures of the indoor unit 2. Here,the second segment display part 50 is larger than the first segmentdisplay part 54. As a result, the user can easily see the settemperatures of the indoor unit 2. It should be noted that the secondsegment display part 50 may have two or more seven-segments beingarranged. In FIG. 5, the set temperature of “22° C.” is displayed as anexample of the second segment display part 50.

The wind speed display part 51 displays the velocity of the air sent bythe indoor unit 2 to the room. The wind direction display part 55displays the direction of the air sent by the indoor unit to the room.The wind direction display part 55 has a vertical direction display part52 and a horizontal direction display part 53. The vertical directiondisplay part 52 displays the wind direction perpendicular to the indoorunit 2. The horizontal direction display part 53 displays the winddirection in the horizontal direction relative to the indoor unit 2.

The controller 13 transmits an electric signal to make the lightemitting diode of the remote control side transmitting part 11 emit ornot emit infrared rays. Further, the controller 13 receives an electricsignal from the remote control side receiving part 12. Here, when theuser sends to the indoor unit 2 a command to diagnose a failure of theoutdoor unit 6 or the indoor unit 2 from the remote control 1, an errorcode indicating the content of the diagnosis is transmitted from theindoor unit 2, and the remote control 1 displays the received errorcode.

When the remote control 1 transmits a transmission code for diagnosingthe failure of the indoor unit 2, the indoor unit 2 immediatelydiagnoses its own failure condition and transmits an error codeindicating the diagnosis result to the remote control 1. On the otherhand, when the remote control 1 transmits a transmission code fordiagnosing a failure of the outdoor unit 6, the indoor unit 2communicates with the outdoor unit 6. The outdoor unit 6 diagnoses itsown failure condition and sends the diagnosis result to the indoor unit2. Upon receiving the diagnosis result of the outdoor unit 6, the indoorunit 2 transmits an error code indicating the diagnosis result of theoutdoor unit 6 to the remote control 1. Therefore, diagnosing theoutdoor unit 6 takes a little longer time than diagnosing the indoorunit 2 since the remote control requires to communicate with the indoorunit 2 and the outdoor unit 3.

The remote control 1 also displays a transmission code indicating whichof the outdoor unit 6 and the indoor unit 2 should be diagnosed. In thisEmbodiment 1, the transmission code is, for example, “25” whendiagnosing the failure of the outdoor unit 6, and “24” when diagnosingthe failure of the indoor unit 2, but the transmission code can bechanged as appropriate. Transmission codes may be set for individualfunctions other than diagnosis of the failure in either of the outdoorunit 6 and the indoor unit 2. When the remote control 1 enters thefailure mode, the controller 13 partially changes the functions of theoperating unit 5. For example, in the failure mode, the controller 13changes the operation stop button 44 to a button for transmitting atransmission code. In the failure mode, the controller 13 changes thewind speed setting button 41, the wind direction setting button 42, andthe time setting button 43 to buttons for setting transmission codes.

FIG. 6 is a schematic view illustrating the display 4 in the failuremode of the air-conditioning apparatus 100 according to Embodiment 1 ofthe present disclosure. When the remote control 1 enters the failuremode, the controller 13 partially changes the functions of the display4. As shown in FIG. 6, the controller 13 displays the transmission codeson the first segment display part 54 in the failure mode. In FIG. 6, atransmission code “24” for diagnosing a failure of the indoor unit 2 isdisplayed. Further, the controller 13 makes all the segments of the windspeed display part 51 and the wind direction display part 55 light up.FIG. 6 shows the display 4 in the state before the transmission of thetransmission code by the remote control 1, and no numerical value isdisplayed on the second segment display part 50.

FIG. 7 is a schematic view illustrating the display 4 in the failuremode of the air-conditioning apparatus 100 according to Embodiment 1 ofthe present disclosure. As shown in FIG. 7, the controller 13 displaysan error code on the second segment display part 50 in the failure mode.In FIG. 7, for example, the error code “82” is displayed. In FIG. 7,after transmitting the transmission code, the remote control 1 receivesthe error code transmitted from the indoor unit 2, thereby displayingthe error code on the second segment display part 50.

FIG. 8 is a flow chart illustrating the operation of the remote control1 according to Embodiment 1 of the present disclosure in the failuremode. Next, the operation of the remote control 1 in the failure modewill be described. If the user determines that a failure needs to bediagnosed, as shown in FIG. 8, the user presses the failure mode button47 (step S101). At this stage, the remote control 1 enters the failuremode, but the remote control 1 does not immediately transmit signals tothe indoor unit 2.

When the user presses the failure mode button 47, the remote control 1enters the failure mode, and the operating unit 5 and the display 4function as they function in the failure mode (step S102). The displaysother than the wind speed display part 5, the wind direction displaypart 55 and the first segment display part 54 are turned off. As aresult, it is possible to allow the user to recognize that the remotecontrol is in the failure mode. The second segment display part 50 isalso turned off.

Next, the controller 13 determines whether the user has pressed anybutton (step S103), and returns to step S102 if the button has not beenpressed. When the user presses one of the buttons, the controller 13determines whether the pressed button is the wind speed setting button41, the wind direction setting button 42, and the time setting button 43for setting the transmission code (step S104). If the pressed button isnot the wind speed setting button 41, the wind direction setting button42 or the time setting button 43, the controller 13 clears the failuremode, and a reset operation is performed (step S105). When the pressedbutton is the wind speed setting button 41, the wind direction settingbutton 42, or the time setting button 43, the transmission codedisplayed on the first segment display part 54 is set to “24” or “25”±1.That is, when the wind speed setting button 41, the wind directionsetting button 42 or the time setting button 43 is pressed, thetransmission code is increased or decreased by 1. When the user pressesthe operation stop button 44, the remote control 1 transmits atransmission code to the indoor unit 2 (step S106). At this time, theremote control 1 transmits a transmission request signal to the indoorunit 2 to request to return an error code.

Then, the controller 13 counts the time, and if an error code is notreturned from the indoor unit 2 before the predetermined reception waitset time elapses (step S107), the controller 13 displays atransmission/reception error code on the second segment display part 50(step S108). If the error code is received from indoor unit 2 before thereception wait set time elapses, the controller 13 determines whether ornot the error code is data that is set in advance relating to thetransmitted code (step S109). If the error code differs from the datathat is set in advance relating to the transmission code, the controller13 displays the transmission/reception error code on the second segmentdisplay part 50 (step S108). On the other hand, if the error code doesnot differ from the data that is set in advance relating to thetransmission code, the controller 13 collates the error code with asignal that is set in advance, and displays the error code on the secondsegment display part 50 (step S110).

According to Embodiment 1, in the failure mode, the controller 13 makesthe first segment display part 54 display the transmission code andmakes the second segment display part 50 display the error code. Asdescribed above, the remote control 1 of the air-conditioning apparatus100 can display the transmission code and the error code even if anincrease in size of the remote control 1 is suppressed by using thesegment display part which is less expensive than the dot matrix displaypart. Thus, it is possible to reduce the size of the wiring and thecomponents, and as a result, the entire remote control 1 can be reducedin size. Accordingly, the user can obtain and use the remote control 1having the same function at a low cost. Since the second segment displaypart 50 is larger than the first segment display part 54, the user caneasily see the error code displayed on the second segment display part50.

In this Embodiment 1, when the remote control 1 enters the failure mode,the remote control 1 does not transmit the transmission code to theindoor unit 2 until the user presses the operation stop button 44.However, this is not restrictive, and when the remote control 1 entersthe failure mode, the remote control 1 may automatically transmit thetransmission code to the indoor unit 2. In this case, it is preferablethat the default transmission code to be transmitted be, for example, atransmission code for diagnosing a failure of the indoor unit 2. This isbecause diagnosis of the failure of the indoor unit 2 completes morequickly than the diagnosis of the failure of the outdoor unit 6 sincethe communication between the indoor unit 2 and the outdoor unit 6 isomitted. After the remote control 1 sends the indoor unit 2 atransmission code for diagnosing the failure in the indoor unit 2 andreceives an error code, the user may change it a transmission code fordiagnosing the failure in the outdoor unit 6 and the remote control 1may send the transmission code to the indoor unit 2 again.

In this Embodiment 1, a case is exemplified in which the display 4 has aplurality of segment display part, but the display 4 may have a dotmatrix display part. In this case, the controller 13 switches aplurality of kinds of operation information sent from the indoor unit 2to let the dot matrix display part display the plurality of kinds ofoperation information sequentially. Further, in Embodiment 1, a case isexemplified in which the transmitting module is a light emitting diodeand the receiving module is a photodiode, and the indoor unit 2 and theremote control 1 communicate with each other using infrared rays. Notethat the transmission module used for performing communication usinginfrared rays is not limited to a light-emitting diode. The receivingmodule used for performing communication using infrared rays is notlimited to a photodiode, and a phototransistor, a thermoelectric elementor a pyroelectric element may be used. As the transmission/receptionmodule, a module such as Bluetooth (registered trademark) or Wi-Fi(registered trademark) may be used. In this case, the filter 3 providedin the remote control 1 becomes unnecessary.

REFERENCE SIGNS LIST

-   -   1 remote control, 2 indoor unit, 3 filters, 4 display, 5        operating unit, 6 outdoor unit, 10 remote control side        transmitting and receiving unit, 11 remote control side        transmitting part 12 remote control side receiving part, 13        controller, 21 indoor side transmitting and receiving unit, 22        indoor side receiving unit, 23 indoor side control device, 40        temperature setting button, 41 wind speed setting button, 42        time setting button, 44 operation stop button, 45 timer-on        button, 46 timer-off button, 47 failure mode button, 50 second        segment display part, 51 wind speed display part, 52 vertical        direction display part, 53 horizontal direction display part, 54        first segment display part, 55 wind direction display part, 70        refrigerant circuit, 71 compressor, 72 flow passage switching        device, 73 outdoor heat exchanger, 74 outdoor fan, 75 expansion        device, 76 indoor heat exchanger, 77 indoor fan, 100        air-conditioning apparatus

1. A remote control for an air-conditioning apparatus, the remotecontrol being used for the air-conditioning apparatus that includes anoutdoor unit and an indoor unit connected to the outdoor unit by a pipeto condition air in an indoor room, the remote control being configuredto bi-directionally communicate with the indoor unit, the remote controlcomprising: a first segment display part in which two or moreseven-segments are arranged; a second segment display part in which twoor more seven-segments are arranged; and a controller, wherein, in afailure mode in which a failure in either the outdoor unit or the indoorunit is diagnosed, the controller makes the first segment display partdisplay a transmission code indicating which of the outdoor unit and theindoor unit is diagnosed to thereby identify a failure, and makes thesecond segment display part display an error code being sent from theindoor unit and representing diagnosis content for the outdoor unit orthe indoor unit.
 2. The remote control for the air-conditioningapparatus of claim 1, wherein the second segment display part is largerthan the first segment display part.
 3. The remote control for theair-conditioning apparatus of claim 1, wherein, in a normal mode inwhich the air-conditioning apparatus performs air-conditioningoperation, the controller makes the second segment display part displaya set temperature for the indoor unit.
 4. The remote control for theair-conditioning apparatus of claim 1, wherein, in a normal mode inwhich the air-conditioning apparatus performs air-conditioningoperation, the controller makes the first segment display part display acurrent time or a timer time.
 5. The remote control for theair-conditioning apparatus of claim 1, to comprising: a wind speeddisplay part having a plurality of segments to display speed of air sentby the indoor unit; and a wind direction display part having a pluralityof segments to display a direction of the air sent by the indoor unit,wherein the controller makes all the segments of the wind speed displaypart and the wind direction display part light up during the failuremode.